COC ORAL EXAM PREPARATION (PART – 9): REFRIGERATION & AIR CONDITIONER
Image Credit: almaco.cc Refrigeration: What is a Refrigerant? Refrigerants are used as working substances in a Refrigeration systems. Fluids suitable for refrigeration purposes can be classified into primary and secondary refrigerants. Primary refrigerants are those fluids, which are used directly as working fluids, for example in vapour compression and vapour absorption refrigeration systems. These fluids …